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3163 Randi (1981 QM)
Classification: Mars-crossing Asteroid          SPK-ID: 2003163
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3356532446049363 4.5083e-08  
a 2.393069167518527 1.0112e-08 AU
q 1.5898277368769 1.0929e-07 AU
i 3.087515870431344 6.2718e-06 deg
node 194.0734388536926 8.5289e-05 deg
peri 121.6174375787161 8.5765e-05 deg
M 304.8601566012749 9.5572e-06 deg
tp 2457007.606787116036
(2014-Dec-16.10678712)
3.6613e-05 JED
period 1352.170023817968
3.70
8.5701e-06
2.346e-08
d
yr
n .2662387078982192 1.6874e-09 deg/d
Q 3.196310598160155 1.3506e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1056  
   data-arc span      25492 days (69.79 yr)  
   first obs. used      1944-09-13  
   last obs. used      2014-06-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49204  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:05:22  

Additional Information
 Earth MOID = .578191 AU 
 T_jup = 3.450 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8 mag n/a MPO263374  
rotation period rot_per 59.50 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Higgins, D.J. (2011) http://www.david-higgins.com/Astronomy/astero id/lightcurves.htm]

3163 Randi (1981 QM)          Discovered 1981-Aug-28 by Kowal, C. at Palomar (675)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1981 QM = 1944 RH = 1970 RK 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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